// @vitest-environment node
import { afterEach, describe, expect, it, vi } from 'vitest';
import * as cloud from '../../electron/coding-teacher/config-client';
import * as transport from '../../electron/utils/proxy-fetch';
import { prepareTeacherModel } from '../../electron/coding-teacher/model-runner';
import type { TeacherDefinition } from '../../shared/coding-teacher';

const account: cloud.TeacherAccount = {
  id: '11111111-1111-4111-8111-111111111111',
  binding: { accountKey: 'teacher-test', epoch: 1 },
};

// JSON round trip reproduces the cloud/durable-topic boundary, including Pydantic nulls.
function definition(choice: unknown): TeacherDefinition {
  return JSON.parse(JSON.stringify({
    schema_version: 1, teacher_id: 'coding-teacher', name: 'Teacher',
    description: '', avatar_id: 'avatar-01', welcome_message: '',
    suggested_questions: [], system_prompt: 'Explain code.', skills: [],
    model: { model_id: 'deepseek-flash', reasoning_choice: choice },
    limits: { max_input_tokens: 8000, max_output_tokens: 1500 },
  }));
}

function setup(canDisable = true) {
  vi.spyOn(cloud, 'teacherCloudRequest').mockResolvedValue({
    api_key: 'synthetic-key', base_url: 'https://teacher-model.invalid/v1',
    models: ['deepseek-flash'],
    model_capabilities_v2: {
      schema_version: 2, models: {
        'deepseek-flash': {
          input_modalities: ['text', 'image'], output_modalities: ['text'],
          reasoning: {
            supported: true, can_disable: canDisable, default_enabled: true,
            effort_values: ['low', 'high', 'max'], default_effort: 'high',
            control_format: 'deepseek',
          },
        },
      },
    },
  });
  vi.spyOn(cloud, 'assertTeacherAccount').mockReturnValue(undefined);
  return vi.spyOn(transport, 'proxyAwareFetch').mockResolvedValue(new Response(
    'data: {"choices":[{"delta":{"content":"Explanation"},"finish_reason":"stop"}]}\n\ndata: [DONE]\n\n',
    { headers: { 'content-type': 'text/event-stream' } },
  ));
}

afterEach(() => vi.restoreAllMocks());

describe('teacher published reasoning wire contract', () => {
  it.each([
    [{ mode: 'enabled', effort: null }, { thinking: { type: 'enabled' } }],
    [{ mode: 'enabled' }, { thinking: { type: 'enabled' } }],
    [{ mode: 'disabled', effort: null }, { thinking: { type: 'disabled' } }],
    [{ mode: 'default', effort: null }, {}],
    [{ mode: 'enabled', effort: 'high' }, { thinking: { type: 'enabled' }, reasoning_effort: 'high' }],
  ])('prepares saved choice %j and sends its native controls', async (choice, fields) => {
    const fetch = setup();
    const prepared = await prepareTeacherModel(account, definition(choice));
    const onText = vi.fn();
    await prepared.run([{ role: 'user', content: 'Explain this.' }], new AbortController().signal, onText);
    expect(onText).toHaveBeenCalledWith('Explanation');
    const body = JSON.parse(String(fetch.mock.calls[0][1]?.body));
    expect({
      ...(body.thinking === undefined ? {} : { thinking: body.thinking }),
      ...(body.reasoning_effort === undefined ? {} : { reasoning_effort: body.reasoning_effort }),
    }).toEqual(fields);
  });

  it.each([
    [{ mode: 'enabled', effort: 'unsupported' }, true],
    [{ mode: 'disabled', effort: null }, false],
  ])('keeps rejecting unsupported choice %j', async (choice, canDisable) => {
    const fetch = setup(Boolean(canDisable));
    await expect(prepareTeacherModel(account, definition(choice)))
      .rejects.toThrow('老师所用思考选项已不可用，请联系运营调整。');
    expect(fetch).not.toHaveBeenCalled();
  });
});